At around 10:00 PM, US news networks announced that Obama would give a speech at 10:30.

Later on, it was reported that it would be a national security speech.

And then at around 10:30, every news network announced that the news was that Osama Bin Laden was killed and captured.

We're still waiting on the speech.

Details continue to dribble out in the meantime.

That he was killed in Pakistan will raise a fresh batch of questions about what Pakistan knew, and the relationship between the US and Pakistan's intelligence authorities.

Update: The news conference has begun, and Obama immediately confirms that Bin Laden is dead.

A few months ago, we learned that Osama was in a compound in Pakistan. After months of intelligence work, Obama authorized an attack last week, and Osama was killed in a firefight today.

A small group killed Bin Laden in a firefight, and no Americans were killed. Pakistan cooperated.

Speech is over.

In news reports after Obama's speech, more details emerged about the events that led to Bin Laden's death. The firefight lasted 40 minutes according to NBC, and four people, including Bin Laden were killed. Reportedly, one of those killed was Bin Laden's son.

He was killed in a mansion in a wealthy neighborhood close to the Pakistani capital.

This cover from the D

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Just announced by CNN:

Barack Obama is to give live speech to the nation at 10:30 ET.

There is no indication of what it's about. Could by Libya. Could be the Mississippi river.

We'll be covering LIVE.

Update: The first clue.. CNN's Steve Brusk tweets: Breaking - We are told it is a national security related announcement by the President.